chore: import upstream snapshot with attribution

pkg/gravatar/gravatar.go

@@ -0,0 +1,50 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package gravatar
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"net/url"
+	"strings"
+)
+
+// GetAvatarURL get avatar url from gravatar by email
+func GetAvatarURL(baseURL, email string) string {
+	hasher := sha256.Sum256([]byte(strings.TrimSpace(email)))
+	hash := hex.EncodeToString(hasher[:])
+	return baseURL + hash
+}
+
+// Resize resize avatar by pixel
+func Resize(originalAvatarURL string, sizePixel int) (resizedAvatarURL string) {
+	if len(originalAvatarURL) == 0 {
+		return
+	}
+	originalURL, err := url.Parse(originalAvatarURL)
+	if err != nil {
+		return originalAvatarURL
+	}
+	query := originalURL.Query()
+	query.Set("s", fmt.Sprintf("%d", sizePixel))
+	originalURL.RawQuery = query.Encode()
+	return originalURL.String()
+}

pkg/gravatar/gravatar_test.go

@@ -0,0 +1,92 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package gravatar
+
+import (
+	"testing"
+
+	"github.com/apache/answer/internal/base/constant"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetAvatarURL(t *testing.T) {
+	type args struct {
+		email string
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			name: "answer@answer.com",
+			args: args{email: "answer@answer.com"},
+			want: "https://www.gravatar.com/avatar/7296942c1f63d97f6c124705142009867638f7b3dbcdadd0cb1bcb40e427eb8e",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.want, GetAvatarURL(constant.DefaultGravatarBaseURL, tt.args.email))
+		})
+	}
+}
+
+func TestResize(t *testing.T) {
+	type args struct {
+		originalAvatarURL string
+		sizePixel         int
+	}
+	tests := []struct {
+		name                 string
+		args                 args
+		wantResizedAvatarURL string
+	}{
+		{
+			name: "original url",
+			args: args{
+				originalAvatarURL: "https://www.gravatar.com/avatar/b2be4e4438f08a5e885be8de5f41fdd7",
+				sizePixel:         128,
+			},
+			wantResizedAvatarURL: "https://www.gravatar.com/avatar/b2be4e4438f08a5e885be8de5f41fdd7?s=128",
+		},
+		{
+			name: "already resized url",
+			args: args{
+				originalAvatarURL: "https://www.gravatar.com/avatar/b2be4e4438f08a5e885be8de5f41fdd7?s=128",
+				sizePixel:         64,
+			},
+			wantResizedAvatarURL: "https://www.gravatar.com/avatar/b2be4e4438f08a5e885be8de5f41fdd7?s=64",
+		},
+		{
+			name: "empty url",
+			args: args{
+				originalAvatarURL: "",
+				sizePixel:         64,
+			},
+			wantResizedAvatarURL: "",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equalf(t, tt.wantResizedAvatarURL, Resize(tt.args.originalAvatarURL, tt.args.sizePixel), "Resize(%v, %v)", tt.args.originalAvatarURL, tt.args.sizePixel)
+		})
+	}
+}